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The HD650
12/11/2012

Pros: - Detailed- Transparent- Responsive Bass- Non-fatiguing, even at high volume levels- Warm- Comfortable (I wear these 8+ hours a day without any discomfort)- Great for most Genre's of music- Lightweight- Scales well with amplification- Modular

Cons: - Needs amplification to truly sound their best- Plastic Material -- Headband known to crack and break (Sennheiser's fix is about ~170$)

- Painted Headband -- Flex on the headband overtime will chip the paint (would say this will inevidibly happen to most of the HD 600's, 650's, and 800's (not sure about 700s)

- Needs a lot of "burn-in" time to sound their best

Other Thoughts: Headphones are subjective and not everyone will like the 650's sound signature (more colored than neutral than what other's offer). These are known to have a warm and veiled sound, which either is bad or good depending on who listens to them. I for one love the way they sounds.

Since the drivers have 300 impedance (more than most), it is highly recommended to use a headphone amplifier. -- I use a "UHA-4 Leckerton Audio DAC amplifier"

These require at least 100 hours of "burn-in" time, and around 500+ hours to hear their true capabilities, so don't be surprised if the headphones don't sound great after only a few hours of use. -- I have used these for 500+ hours, and noticed they have greatly improved, providing better bass response and are much more detailed, and find it very difficult to listen to any other headphones (became accustomed, and attached, to the 650's signature)

**If used not amplified, and plugged into an ipod (or most mp3 players), they will sound very quiet, even at highest volume settings. They will also have poor bass response. This is why "burn-in" and amplification is highly recommended. After proper burn-in time, they do open up a lot, even if they are not amplified.

Cons: - Same issues with before, the two rear fans blow hot air back into the case but it does keep the card rather cool, even during summer (I'm comfortable as long as it keeps under 70C)- Flimsy (need to handle the card by the board, and flimsy once you start handling the cooler)- Voltage Regulators (see below)

This card is running great. I run my computer every day (had the card since mid-February) and hasn't shown any sign of slowing down (no hardware failures). I don't over clock, however, due to the issue of lousy Voltage Regulators installed onto the board and I don't recommend ever doing so (even with good cooling). The 570s are known for exploding Voltage Regulators when overclocked. Even then, some do explode @ stock speeds.

Overall, I recommend this card if your intending to only use a Single Card and not in SLI mode with the fan cooler. The cooler needs room for the air to pass through with the least amount of resistance if possible, otherwise you'll see higher than average temperatures.

Amazing Card
02/22/2011

Pros: - Runs very cool compared to my old card (~33c idle, ~55c full load)- No Frame spiking, in other words, smooth game play- Quiet compared to the stock leaf blowers- Ability to play older games (specific Z-buffering support)

Cons: - The fans (excluding the one blowing out of the case) blows hot air inside the case.- Need a decent case with good airflow

My old card died after 2 years (constant temps of around ~55c idle, ~90c load at stock fan speed; Brand-new as well). I had to keep the fan speed at 55% to get it to comfortable temps to get more years out of the card. The noise level of the card was annoying, but good thing I had noise-cancelling headphones.

Also, if I wanted to run SLI on these cards, I would need to upgrade my motherboard to a 1366 socket or 1155 socket (I'm already bottle necking this video card through the current setup) to get the full use out of these cards. Otherwise, this is a great card. Well worth the money.